VIRTUAL IMAGE DEPLOYMENT WITH A WARM CACHE

• US 20120192184A1
• Filed: 03/29/2012
• Published: 07/26/2012
• Est. Priority Date: 12/18/2009
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Burckart, Erik J., Ivory, Andrew J., Kaplinger, Todd E., Shook, Aaron K.
• Granted Patent: US 8,424,001 B2
• Time in Patent Office: Days
• US Class Current: 718/1
• CPC Class Codes: G06F 2009/45562 Creating, deleting, cloning virtual machine instances
• CPC Class Codes: G06F 2009/4557 Distribution of virtual machine instances; Migration and load balancing
• CPC Class Codes: G06F 3/14 Digital output to display device ; Cooperation and interconnection of the display device with other functional units
• CPC Class Codes: G06F 9/45558 Hypervisor-specific management and integration aspects
• CPC Class Codes: G09G 2360/121 using a cache memory
• CPC Class Codes: G09G 2360/125 using unified memory architecture [UMA]
• CPC Class Codes: G09G 2370/022 Centralised management of display operation, e.g. in a server instead of locally

Abstract

A cache image including only cache entries with valid durations of at least a configured deployment date for a virtual machine image is prepared via an application server for the virtual machine image. The virtual machine image is deployed to at least one other application server as a virtual machine with the cache image including only the cache entries with the valid durations of at least the configured deployment date for the virtual machine image.

Claims

1. A method, comprising:

preparing, via an application server for a virtual machine image, a cache image comprising only cache entries with valid durations of at least a configured deployment date for the virtual machine image; and

deploying the virtual machine image to at least one other application server as a virtual machine with the cache image comprising only the cache entries with the valid durations of at least the configured deployment date for the virtual machine image.

2. The method of claim 1, where preparing, via an application server for a virtual machine image, a cache image comprising only cache entries with valid durations of at least a configured deployment date for the virtual machine image comprises:

populating the cache image via memory access operations for selected data accesses associated with the virtual machine image;

determining, for each memory access operation, whether each data element accessed by each memory access operation comprises a valid duration of at least the configured deployment date for the virtual machine image; and

storing within the cache image only the data elements determined to have the valid duration of at least the configured deployment date for the virtual machine image.

3. The method of claim 1, where preparing, via an application server for a virtual machine image, a cache image comprising only cache entries with valid durations of at least a configured deployment date for the virtual machine image comprises:

storing within the cache image only data elements determined to have a valid duration of at least the configured deployment date for the virtual machine image; and

indexing each of the stored cache entries with an expiration date representing the valid duration associated with each of the cache entries.

4. The method of claim 1, further comprising:

determining that the configured deployment date for the virtual machine image has changed;

determining the valid duration associated with each cache entry within the cache image; and

deleting any of the cached entries determined not to have a valid duration of at least the changed configured deployment date for the virtual machine image; and

where deploying the virtual machine image to at least one other application server as a virtual machine with the cache image comprising only the cache entries with the valid durations of at least the configured deployment date for the virtual machine image comprises deploying the virtual machine image to the at least one other application server as the virtual machine with the cache image comprising only the cache entries with the valid durations of at least the changed configured deployment date for the virtual machine image.

5. The method of claim 1, further comprising:

determining that the configured deployment date for the virtual machine image has changed; and

instructing the at least one other application server to invalidate any cache entries that do not have a valid duration of at least the changed configured deployment date for the virtual machine image.

6. The method of claim 1, further comprising:

configuring the cache image to store at least one of a just-in-time (JIT) table and a shared classes cache; and

storing the at least one of the JIT table and the shared classes cache to the cache image; and

where deploying the virtual machine image to at least one other application server as a virtual machine with the cache image comprising only the cache entries with the valid durations of at least the configured deployment date for the virtual machine image comprises deploying the virtual image to the at least one other application server as the virtual machine with the cache image comprising only the cache entries with the valid durations of at least the configured deployment date for the virtual machine image and the at least one of the JIT table and the shared classes cache.

7. The method of claim 1, further comprising:

querying the at least one other application server for cache-hit performance data;

receiving the cache-hit performance data from the at least one other application server; and

upon a determination that the cache-hit performance data does not meet anticipated cache deployment performance for the virtual machine image, modifying automated cache image population processing that performs memory access operations for selected data accesses associated with the virtual machine image.